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Drag bug with fairing part/engine mount shroud attached on mk1 capsule pod


Mushylog

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Reported Version: v0.1.5 (latest) | Mods: none | Can replicate without mods? Yes 
OS: Edition Windows 10 Home Version 22H2 Installed on ‎29/‎06/‎2022 OS build 19045.3570 Experience Windows Feature Experience Pack 1000.19052.1000.0 | CPU: CPU Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz Base speed: 3.40 GHz Sockets: 1 Cores: 4 Logical | GPU: GPU 0 NVIDIA GeForce RTX 3060 Ti Driver version: 31.0.15.4592 Driver date: 19/10/2023 DirectX | RAMMemory 32.0 GB DDR3 Speed: 1600 MHz Slots used: 4 of 4 Form factor: DIMM Hardware reserved: 4

 

Here is a video with timestamped chapters.

 

Expected behaviour: 

During re-entering the atmosphere, the capsule pod orients itself pointing retrograde.

 

What happens (with the Cockleshell fairing part):

During re-entering the atmosphere, the capsule pod does not point retrograde and instead will stay between prograde and retrograde while randomly oscillating between radial-in and radial-out.

It looks like the fairing part confuses the "drag cube" of the game for the active vessel: the craft (with the fairing part) seems to be aerodynamic in only a certain position (a contradictory position based on what we see). Check the YouTube video for better representation of the issue.

 

Included Attachments:

MalgardsPeamk1.json

Edited by The Space Peacock
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Reported Version: v0.2.0 (latest) | Mods: none | Can replicate without mods? Yes 
OS: Win 11 | CPU: Intel Core i7-10870H | GPU: GeForce GTX 1660 Ti | RAM31,84

 

If you use an engine mount as a fairing, it looks like parts inside keep no-drag modifier even if the shroud is detached. So if you hide a capsule inside an upside-down engine mount, you cannot reenter. Take the attached craft, launch it into an orbit with periapsis below 70km (in atmosphere). Drop all stages until only a capsule remains. And you will be orbiting indefinitely. You cannot even deploay a parachute.

Craft parts (in order):

  1. Nose cone
  2. Decoupler (upside-down)
  3. ------- (space provided by engine mount fairing end)
  4. parachute
  5. capsule
  6. heatshield
  7. decoupler
  8. engine mount (upside-down, fairing length 1.75m)
  9. fuel tank
  10. etc

 

 

 

Included Attachments:

Testengineshroud.json

Edited by The Space Peacock
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